A security guard at a high school in the south suburbs died, after trying to break up a fight.
It happened Thursday afternoon at Thornwood High School in South Holland.
Police say Richard Cowser and another security guard were trying to stop a fight between two female students in a school hallway.
When Cowser tried to separate the students, he fell against a locker and began having trouble breathing.
Cowser was taken to the hospital, where he was pronounced dead.
Family members say Cowser had no serious health problems.
He was 54-years-old.
After a police investigation the Cook County State’s attorney will not file charges against the students involved in the fight.
An autospy Friday was inconclusive so more tests are needed to determine how Cowser died.